[bullfrog99]

Looking at a used model glock 20 at the shop, I noticed an unusual thing on the breechface of the slide. There is vertical scratches or gouges that almost look to me to be heat scaleing like the first inch or two of the bore on a well used 22-250. I am unfamiliar with used glocks so this may be usual but it seemed odd to me. I'm not sure what could cause this. the gun seems sound otherwise and the price is right but the breechface gave me reason to pause and think about it.

[JohnKSa]

Not very pretty, but it's on every Glock breechface I've ever seen...